/*-
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * Portions copyright (c) 1999, 2000
 * Intel Corporation.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 * 
 *    This product includes software developed by the University of
 *    California, Berkeley, Intel Corporation, and its contributors.
 * 
 * 4. Neither the name of University, Intel Corporation, or their respective
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS, INTEL CORPORATION AND
 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS,
 * INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *	@(#)callout.h	8.2 (Berkeley) 1/21/94
 * $Id: callout.h,v 1.1.1.1 2006/05/30 06:12:51 hhzhou Exp $
 */

#ifndef _SYS_CALLOUT_H_
#define _SYS_CALLOUT_H_

#include <sys/queue.h>

SLIST_HEAD(callout_list, callout);
TAILQ_HEAD(callout_tailq, callout);

struct callout {
	union {
		SLIST_ENTRY(callout) sle;
		TAILQ_ENTRY(callout) tqe;
	} c_links;
	int	c_time;				/* ticks to the event */
	void	*c_arg;				/* function argument */
	void	(*c_func) __P((void *));	/* function to call */
};

struct callout_handle {
	struct callout *callout;
};

#ifdef KERNEL
extern struct callout_list callfree;
extern struct callout *callout;
extern int	ncallout;
extern struct callout_tailq *callwheel;
extern int	callwheelsize, callwheelbits, callwheelmask, softticks;

#ifndef _ORG_FREEBSD_
/*
 *  The multiplier is 95% of actual to be sure we are on the lean side of
 *  the measured HZ value.  This will assure us that we will not skip a
 *  tick because of an inaccurate calibration measurement or integer math.
 */
#define	TickToEfiTimerVal( ticks )	( (9500000 / hz ) * ticks )
#endif

#endif /* KERNEL */

#endif /* _SYS_CALLOUT_H_ */
